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Boulder opal is distinct from black opal in the following ways: * Boulder opal is usually mined in open-cut operations while black opal is mined in shafts. * Boulder opal is found in ironstone boulders, while black opal is found in seams.

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What is a Yowah nut?

A Yowah nut is a boulder opal, a precious stone, originating in Yowah, Australia.


Are there different kinds of opal?

The types of Opal that i am familiar with are White Opal, Fire Opal, Boulder Opal, Black Opal, Crystal Opal, Light Opal, Doublet Opal, Triplet Opal, Common Opal, Synthetic Opal, and Immitation Opal.


Where are opals made?

Australian Opal are dug and cut both on the opal fields and in the city's. they are found in New South Wales (NSW) - The Home of Black Opal New South Wales produces most of the Opal of Australia. Lightning Ridge opal is the darkest and most valuable form of opal. White Cliffs, produces white or crystal opal in the form of 'seam White Cliffs is also noted for the production of 'opal pineapples' Queensland produces boulder opal, these occur in deposits in weathered sedimentary Cretaceous rocks in the west of the state Quilpie, Queensland the largest producer of boulder opal in the world Winton, Queensland Opalton, Queensland Yowah, Queensland home of the opal refered to as Yowah Nut, South Australia - The White Opal Fields South Australia has 4 working opal fields, Andamooka, Coober Pedy, Lambina and Mintabie. South Australia produces the largest amount of opal and this is known as milky opal. Coober Pedy produces most the world's white opal. Andamooka, South Australia Mintabie, South Australia Lambina, South Australia


What stones are similar to opal?

Stones similar to opal include labradorite, which exhibits a play of color known as schiller, and moonstone, known for its adularescence and shimmering effect. Other alternatives are fire opal, which displays vibrant colors, and boulder opal, featuring the host rock integrated with the opal. Additionally, synthetic opals, created in labs, mimic the appearance of natural opals but are more uniform in color.


What is the rearest type of opal?

The rarest type of opal is the black opal, particularly those that originate from Lightning Ridge in Australia. Black opals feature a dark body tone that enhances their vibrant play-of-color, making them highly sought after by collectors. Other rare types include white opal with a unique play-of-color and boulder opal, which is formed within ironstone rock. Overall, the combination of color, clarity, and origin significantly impacts their rarity and value.


How many opal types are there?

There are 5 basic types of opal. These types are Peruvian Opal, Fire Opal, Girasol Opal, Common opal and Precious Opal.


What precious stones are mined for in cooper pedy?

In Coober Pedy, Australia, the primary precious stone mined is opal, renowned for its vibrant colors and unique play-of-color. This underground mining town is famous for producing high-quality opals, including white opal, black opal, and boulder opal. The region's harsh climate has led to the development of unique underground homes and mines, making it a distinctive location for both mining and tourism.


What does a Opal rock look like?

Opal is a unique gemstone that typically exhibits a play-of-color, displaying vibrant flashes of various hues, including red, blue, green, and yellow, as light interacts with its internal structure. The stone can appear translucent to opaque and often has a smooth, rounded surface. Common opal types include white, black, and boulder opal, each showcasing different backgrounds and patterns. Its overall appearance can range from a milky or cloudy look to a more vivid, iridescent effect depending on the quality and type of opal.


How many types of opals are there?

There are 5 basic types of opal. These types are Peruvian Opal, Fire Opal, Girasol Opal, Common opal and Precious Opal.


Are opals the only gems in coober pedy?

No, opals are not the only gems found in Coober Pedy. While the region is famous for its high-quality opal deposits, other minerals and gemstones, such as zircon, boulder opal, and various types of quartz, can also be found there. Additionally, Coober Pedy is known for its unique underground residences and mining culture.


What is another name for opal?

Another name for opal is "fire opal."


What is the fracture of opal?

The fracture of an opal can be hard or smooth , An opal can have as many fractures as any other mineral can . Sometimes opal can be smooth , sometimes they can be hard . The fracture of an opal is hard and smooth .